On Wed, Feb 28, 2024 at 06:02:33PM -0800, Song Liu wrote: > md-6.9 branch doesn't have all the fixes, as some recent fixes > are routed via the md-6.8 branch. You can try on this branch, which > should provide a better base line. The set applies cleanly on this > branch. > > https://git.kernel.org/pub/scm/linux/kernel/git/song/md.git/log/?h=md-6.9-for-hch This branch crashes for me when running the lvm2 test suite: ### running: [ndev-vanilla] shell/lvconvert-raid-reshape.sh 0:26.281[ 1108.566441] md: mdX: re. [ 1108.694826] md/raid:mdX: device dm-67 operational as raid disk 0 [ 1108.695034] md/raid:mdX: device dm-69 operational as raid disk 1 [ 1108.695360] md/raid:mdX: device dm-71 operational as raid disk 2 [ 1108.695532] md/raid:mdX: device dm-73 operational as raid disk 3 [ 1108.696468] md/raid:mdX: raid level 5 active with 4 out of 4 devices, algorithm 2 [ 1108.696801] device-mapper: raid: raid456 discard support disabled due to discard_zeroes_data unce. [ 1108.697059] device-mapper: raid: Set dm-raid.devices_handle_discard_safely=Y to override. [ 1109.129345] md/raid:mdX: device dm-67 operational as raid disk 0 [ 1109.129550] md/raid:mdX: device dm-69 operational as raid disk 1 [ 1109.129720] md/raid:mdX: device dm-71 operational as raid disk 2 [ 1109.129887] md/raid:mdX: device dm-73 operational as raid disk 3 [ 1109.130775] md/raid:mdX: raid level 5 active with 4 out of 4 devices, algorithm 5 [ 1109.134517] device-mapper: raid: raid456 discard support disabled due to discard_zeroes_data unce. [ 1109.135207] device-mapper: raid: Set dm-raid.devices_handle_discard_safely=Y to override. [ 1112.713392] md: reshape of RAID array mdX [ 1112.828252] BUG: kernel NULL pointer dereference, address: 0000000000000088 [ 1112.828467] #PF: supervisor read access in kernel mode [ 1112.828613] #PF: error_code(0x0000) - not-present page [ 1112.828755] PGD 0 P4D 0 [ 1112.828829] Oops: 0000 [#2] PREEMPT SMP NOPTI [ 1112.828955] CPU: 1 PID: 1785 Comm: kworker/1:2 Tainted: G D W 6.8.0-rc3+ #2235 [ 1112.829181] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/014 [ 1112.829422] Workqueue: md_misc md_start_sync [ 1112.829542] RIP: 0010:md_start_sync+0x66/0x2e0 [ 1112.829666] Code: c0 0f 85 ef 00 00 00 48 83 bb 50 fd ff ff ff 0f 84 9d 01 00 00 48 8b 83 90 fb f5 [ 1112.830197] RSP: 0018:ffffc900016dbe28 EFLAGS: 00010213 [ 1112.830337] RAX: 0000000000000000 RBX: ffff888115a224d0 RCX: 0000000000000000 [ 1112.830527] RDX: 0000000000000000 RSI: ffffffff8301a09e RDI: 00000000ffffffff [ 1112.830717] RBP: ffff888115a222b0 R08: 0000000000000001 R09: 0000000000000000 [ 1112.830906] R10: ffffc900016dbe28 R11: 0000000000000001 R12: ffff888115a222b1 [ 1112.831094] R13: ffff888115a22058 R14: 0000000000000000 R15: ffffffff81190681 [ 1112.831285] FS: 0000000000000000(0000) GS:ffff8881f9d00000(0000) knlGS:0000000000000000 [ 1112.831497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1112.831653] CR2: 0000000000000088 CR3: 000000010426c000 CR4: 0000000000750ef0 [ 1112.831879] PKRU: 55555554 [ 1112.831954] Call Trace: [ 1112.832024] <TASK> [ 1112.832085] ? __die+0x1e/0x60 [ 1112.832173] ? page_fault_oops+0x154/0x450 [ 1112.832286] ? do_user_addr_fault+0x69/0x7e0 [ 1112.832403] ? exc_page_fault+0x6d/0x1c0 [ 1112.832512] ? asm_exc_page_fault+0x26/0x30 [ 1112.832628] ? process_one_work+0x171/0x4a0 [ 1112.832743] ? md_start_sync+0x66/0x2e0 [ 1112.832849] ? md_start_sync+0x35/0x2e0 [ 1112.832957] process_one_work+0x1d8/0x4a0 [ 1112.833066] worker_thread+0x1ce/0x3b0 [ 1112.833169] ? wq_sysfs_prep_attrs+0x90/0x90 [ 1112.833285] kthread+0xf2/0x120 [ 1112.833374] ? kthread_complete_and_exit+0x20/0x20 [ 1112.833504] ret_from_fork+0x2c/0x40 [ 1112.833616] ? kthread_complete_and_exit+0x20/0x20 [ 1112.833746] ret_from_fork_asm+0x11/0x20 [ 1112.833855] </TASK> [ 1112.833918] Modules linked in: dm_raid i2c_i801 crc32_pclmul i2c_smbus [last unloaded: scsi_debug] [ 1112.834156] CR2: 0000000000000088 [ 1112.834248] ---[ end trace 0000000000000000 ]--- [ 1112.834373] RIP: 0010:remove_and_add_spares+0x72/0x2f0
